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"CVE-2021-33643", "lastModified": "2026-06-17T03:54:57.067", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-08-10T20:15:20.450", "references": [{"source": "securities@openeuler.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/"}, {"source": "securities@openeuler.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/"}, {"source": 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{"affected_release": [{"advisory": "RHSA-2023:2898", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "libtar-0:1.2.20-17.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-05-16T00:00:00Z"}], "bugzilla": {"description": "libtar: out-of-bounds read in gnu_longlink", "id": "2121289", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2121289"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H", "status": "verified"}, "cwe": "CWE-125", "details": ["An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.", "A flaw was found in libtar. This flaw allows an attacker who submits a crafted tar file with the size in the header struct being 0 to trigger a calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read."], "name": "CVE-2021-33643", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libtar", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "libtar", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2022-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-33643\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-33643\nhttps://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807"], "threat_severity": "Moderate"}

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